Hello<I am Ron.Be sure the battery is good by checking,or having it checked.Check the cca,and load test.If this checks out,then proceed to look for bad terminal connections and then either a burned out fusible link,or large maxie fuse.Fusible links look like a wire,but will pull apart like taffy if the are burned out.Look near a positive wire junction,most likely near battery.The fusible link will be attached there.Be sure if the battery checks bad,to check the alternator,or have it checked.If I can help,let me know.>>roniecon@gmail.com

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Do you have power?
battery might be drained cause your alternator is not charging anymore, 2003, seems about time for a new alternator, those vehicles consume lots of power cause pretty much everything is electric, lots of motors and servos, so they depend a lot on a good power source from the battery. If alternator doesnt charge it, no power...

test the voltage on both the batterys positive and the jumping post positive while cranking, that will tell you how much power is being drawn and where you maybe loosing it, i would replace any battery that drops below 11volts